Sik, 46, tweeted: "I am being detained. I will be taken to the prosecutor's office regarding a tweet."

He has been accused of spreading "terrorist propaganda", reports say.

He and journalist Nedim Sener were previously jailed in 2011-2012. The authorities banned Sik's book The Imam's Army, which examined the life and work of Fethullah Gulen, the US-based cleric blamed by the Turkish government for the July coup attempt.

A version of the book was however published in November 2011.

Kurdish links

Asli Erdogan, 49, and Necmiye Alpay, 70, are among nine suspects charged over their links to the pro-Kurdish newspaper Ozgur Gundem, which was shut down in August.

The authorities regard Ozgur Gundem as a mouthpiece for the banned Kurdistan Workers' Party (PKK), an armed group fighting for more Kurdish autonomy. Turkey and its Western allies regard the PKK as a terrorist organisation.